President Donald Trump's legal team is mounting a credibility attack on former National Security Adviser Michael Flynn, with plans to portray him as "a liar seeking to protect himself if he accuses the president or his senior aides of any wrongdoing," The Washington Post reported Wednesday.

"He's said it himself: He's a liar," one person working on the strategy told the Post.

Flynn's attorney, Robert Kelner, declined to comment.

Ty Cobb, President Trump's private attorney overseeing the response to Russia special counsel Robert Mueller's investigation, also declined to comment.

The Post said its report was based on "three people familiar with the strategy."

The approach would mark a sharp departure from Trump's generally sympathetic approach toward Flynn, 58, a retired Army lieutenant general.

President Donald Trump's legal team is mounting a credibility attack on former National Security Adviser Michael Flynn, with plans to portray him as "a liar seeking to protect himself if he accuses the president or his senior aides of any wrongdoing," The Washington Post reported.